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Author Topic: 1972 Yamaha LS3 Tracker - First Ever Build  (Read 2854 times)

Offline mrg_ls3

  • Posts: 10
1972 Yamaha LS3 Tracker - First Ever Build
« on: Feb 26, 2015, 20:14:05 »
Hi All,

I have always wanted to do a custom build but never knew where to start.  Recently found a 1972 Yamaha LS3 really cheap and thought it would be the perfect bike to do my first build on.



The vision is to turn this in to a street tracker on the cheap and learn lots along the way.  Basically I have stripped the bike down to frame only and plan to get it powered coated and change the front-end.

any tips on finding front forks & wheel set-up to fit would be greatly appreciated.

i will post more pics once I can get them off my phone.

Offline mrg_ls3

  • Posts: 10
Re: 1972 Yamaha LS3 Tracker - First Ever Build
« Reply #1 on: Mar 03, 2015, 21:17:29 »
Have been busy stripping the bike down  here a few pictures of the bike in different stages.

Frame is back to bare metal  - ready to be powder coated
Engine has peen polished and repainted head
speedo has been cleaned and polished
rims are ready to be powered coated

hopefully it will be back to a rolling frame in the couple of weeks.

Offline grandpaul

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Re: 1972 Yamaha LS3 Tracker - First Ever Build
« Reply #2 on: Mar 04, 2015, 15:33:36 »
Looks like a fun little bike to zip around on, especially if you weigh less than 125#.

Have fun with it.
It ain't braggin' if ya done it.

Offline mrg_ls3

  • Posts: 10
Re: 1972 Yamaha LS3 Tracker - First Ever Build
« Reply #3 on: Apr 26, 2015, 23:00:18 »
More progress has been made I've started the final spray on the frame.  The first top coat has been applied and it's looking ok so far.  my garage is looking like a butchers for bike parts.

Offline grandpaul

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Re: 1972 Yamaha LS3 Tracker - First Ever Build
« Reply #4 on: May 07, 2015, 16:30:01 »
More progress has been made ...

hee hee

That photo of the silver bracket looks like it's bigger than the bike, sitting on the floor right next to it!
It ain't braggin' if ya done it.

Offline mrg_ls3

  • Posts: 10
Re: 1972 Yamaha LS3 Tracker - First Ever Build
« Reply #5 on: Feb 13, 2017, 16:50:27 »
It's been a long time but I've nearly completed the build.

Just need to add some 6V bulbs and a new flasher relay and I'm good to go.









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Offline parksieNZ

  • Posts: 19
Re: 1972 Yamaha LS3 Tracker - First Ever Build
« Reply #6 on: Feb 14, 2017, 02:32:37 »
Looks good, but is your engine vent connected to your battery drain?

Offline mrg_ls3

  • Posts: 10
Re: 1972 Yamaha LS3 Tracker - First Ever Build
« Reply #7 on: Feb 14, 2017, 06:32:42 »
Looks good, but is your engine vent connected to your battery drain?

That's the two stroke oil line. The LS3 keeps the two stroke in a seperate oil tank. I still need to decide if I run pre mix or hook back up to a two stroke tank


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Offline pacomotorstuff

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Re: 1972 Yamaha LS3 Tracker - First Ever Build
« Reply #8 on: Feb 14, 2017, 07:55:43 »
Neat little ride.
IMHO, keep the oil pump (it works, right?), especially for a street bike. The first time you forget to premix the gas, a world of hurt will ensue - I bought a Bridgestone 50 Sport that had only 50 miles on it due to that issue.  A small oil tank will almost invisible if you do it right.
The short rear fender looks neat, except for the first time you ride in the rain, you'll find enough shite thrown on the back of your motor and into the carb, you'll be amazed.  The stock rear fender is pretty chunky (I had a Yamaha RS100 and the chassis looks almost identical) but maybe look for something less bulky?  I used a BSA front fender as the rear fender on my tracker and one of our  Ducati 750 fiberglass front fenders for the rear of my Bridgestone 175 road racer - both pretty skinny and stopped the crud. 
Photo of the tracker frame with the BSA fender installed.
Great little bike and should be fun to blast around on.
Pat

Offline mrg_ls3

  • Posts: 10
Re: 1972 Yamaha LS3 Tracker - First Ever Build
« Reply #9 on: Feb 15, 2017, 17:26:45 »
Neat little ride.
IMHO, keep the oil pump (it works, right?), especially for a street bike. The first time you forget to premix the gas, a world of hurt will ensue - I bought a Bridgestone 50 Sport that had only 50 miles on it due to that issue.  A small oil tank will almost invisible if you do it right.
The short rear fender looks neat, except for the first time you ride in the rain, you'll find enough shite thrown on the back of your motor and into the carb, you'll be amazed.  The stock rear fender is pretty chunky (I had a Yamaha RS100 and the chassis looks almost identical) but maybe look for something less bulky?  I used a BSA front fender as the rear fender on my tracker and one of our  Ducati 750 fiberglass front fenders for the rear of my Bridgestone 175 road racer - both pretty skinny and stopped the crud. 
Photo of the tracker frame with the BSA fender installed.
Great little bike and should be fun to blast around on.
Pat

Nice tips - I'll get the thing on the road and make more changes as I go.


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